Step 1: Check whether the AC input of the power supply is normal? Is it because the power strip controlled by the switch is forgot to turn on or was turned off by a colleague without being noticed. Check whether the display on the power supply has a display, if not, please check whether the fuse of the power supply is blown.

Step 2: After confirming that the power input is normal, set the output voltage and current of the power supply, both of which cannot be 0 (especially note that the current cannot be 0). If it is found that the setting value cannot be displayed, some GW Instek models provide a keyboard lock function to ensure that the setting value is not misused during the test. Please confirm whether the model you are using has this function. If so, please confirm that the Key Lock indicator is off, if the Key Lock light is on, please unlock it first. If the power supply still cannot be set, please confirm whether the power supply is connected to the computer. If the computer is connected, the remote control mode will cancel the Local operation.

Step 3: If the power supply has an output control switch, please press on. Power supply with an output control switch often has a light signal indicating that the output is turned on.

Step 4: If the output control switch is turned on and the light is not on (the light may be faulty, but the power supply still has output), please use the voltage range of a multimeter to measure the output of the power supply. There are several power supplies of GW Instek with on/off delay timer function. Please also check whether the output has a time delay because this function is turned on.


If the power supply still has no output after the above steps, please contact your nearest GW Instek Service Center to arrange for the instrument to be repaired. 

Service Support:
services@goodwill.com.tw

Regarding to verify the power supply specifications please make sure the power supply is powered on at least 30 minutes,within +20℃ ～ -30℃.

The following scenarios are possible:The following scenarios are possible:

• The rear panel remote control terminal is in the Off position. In this case, set it to the On position or deactivate remote control. For details, please refer see our user manual page39.

• The OVP setting switch on the rear panel is on the SET side. In this case, set the switch to the Normal side.

•The OVP indicator is red. In this case, change the OVP setting to higher value or remove the over voltage condition. 

*Note that in several conditions, the Output key automatically turns Off to avoid harmful condition. For details, please refer our user manual.

When using [User Special Function]->, select option 5. Add New Module and a message “ Invalid License” pop up

Check if the firmware version is too old? If it is lower than V2.10, please update to this version

1 Download the firmware version V2.10, there are a total of three files gw.sbt

https://www.dropbox.com/s/mlnsgpfu3xkbecs/gw.sbt?dl=0

https://www.dropbox.com/s/59m3kvvygpx9g98/gw_aps_uboot.blk?dl=0

https://www.dropbox.com/s/o981erg6zpxbah2/gw_aps_kernel.blk?dl=0

2 Create a GW folder in the root directory of the USB Flash Drive formatted as FAT-32.

3 Copy the downloaded file gw.sbt to the \gw folder of this USB Flash Drive

4 Insert the USB Flash Drive into the USB port on the front panel of the APS

5 Press MENU

6 Turn the knob to 11. Special Function and press Enter

7 Enter the password "5004"

8 Turn the knob to 1. Update Firmware and press Enter, there will be no screen update for a while

9 Turn the knob to 2. Update Boot and press Enter, there will be no screen update for a while

10 Turn the knob to 3. Update Kernel and press Enter, there will be no screen update for a while

The remote sensing (Please refer our user manual) compensates for the cable loss for up to 0.5V. If the output level goes much higher, the remote sensing terminal might be disconnected. Make sure the connection is secure. Please refer our user manual page32 for details.

Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. Auto Running Operation The function must be used together with the DELAY setting which is defined as the operation delay time of next running operation. The Delay function is workable only under Auto Running operation. 

1)Delay time setting: Press [DELAY] to set the panel operation to Delay time setting selection. 

2)The setting and store of very group of data: A group setting includes the Output range, Output voltage value, Output current value, Over Voltage protection level, Over Current protection level, Over Voltage status (ON/OFF), and Delay time. User can proceed the setting and store it to the memory bank group by group up to 100 groups maximum. 

3)Recall range setting (Auto running operation range): Regarding the setting description, please refer to AUTO RANGE operation. 

4)Enter AUTO mode by pressing [AUTO], now, the operation is in the auto running function by pressing [OUTPUT]. 

5)Under this mode, press [SHIFT][AUTO INFO] can monitor the current operation setting address and operation time.

Line regulation and load regulation are two important specifications that are used to measure the performance of voltage regulators.

Line regulation refers to the ability of a voltage regulator to maintain a constant output voltage, despite variations in the input voltage or the supply voltage. In other words, it measures how well the regulator can regulate the output voltage when the input voltage is changing. Line regulation is typically expressed as a percentage of the output voltage per unit change in the input voltage. For example, a regulator with a line regulation specification of 0.1% per volt means that for every 1 volt change in the input voltage, the output voltage will change by no more than 0.1%.

Load regulation, on the other hand, refers to the ability of a voltage regulator to maintain a constant output voltage, despite changes in the load current. In other words, it measures how well the regulator can regulate the output voltage when the load is changing. Load regulation is typically expressed as a percentage of the output voltage per unit change in the load current. For example, a regulator with a load regulation specification of 0.5% per amp means that for every 1 amp change in the load current, the output voltage will change by no more than 0.5%.

Both line and load regulation are important specifications for voltage regulators, as they can affect the stability and reliability of electronic circuits that rely on a constant and stable voltage supply.

Read More: DC Power Supply

#DC Power Supplies #line Regulation #Load Regulation

In theory, it is possible to run a house on DC (direct current) power. However, it would require a significant overhaul of the existing electrical infrastructure in the house.

Most homes are wired for AC (alternating current) power, which means that all the electrical appliances and devices in the house are designed to run on AC power. In order to run a house on DC power, all of the electrical wiring and devices would need to be modified to accept DC power.

Additionally, most of the electrical energy produced by power stations is transmitted as AC power, so if you wanted to power your house using DC power, you would need to generate your own DC power using solar panels or other alternative energy sources. This would require a significant investment in equipment and installation costs.

Overall, while it is technically possible to run a house on DC power, it would require a significant amount of work and investment to make the switch from AC power to DC power.

Read More: www.gwinstek.com/en-global/products/layer/DC_Power_Supply

#DC Power Supplies #AC Power Supplies

AC (alternating current) and DC (direct current) are two different types of electrical power supplies.

AC power supply provides electrical energy that periodically changes direction, meaning that the voltage and current regularly reverses direction. This type of power supply is commonly used in homes and buildings to power electrical devices, as well as in the distribution of electrical power over long distances. AC power is usually generated by electric power stations using rotating machines such as turbines or generators.

DC power supply provides electrical energy that flows in one direction, meaning that the voltage and current remain constant in one direction. This type of power supply is used in many electronic devices and systems, as well as in transportation, such as electric cars, buses, and trains. DC power can be obtained from batteries, solar panels, or DC power supplies.

The main difference between AC and DC power is the direction and frequency of the voltage and current. While AC power periodically changes direction, DC power remains constant in one direction. AC power is more commonly used for power transmission, while DC power is more commonly used for electronic devices and systems.

Read More: DC Power Supply

#DC Power Supplies #AC Power Supplies

DC (direct current) power is used in a variety of applications, including:

• Electronics: Many electronic devices, such as computers, smartphones, and televisions, require DC power to operate. DC power supplies are often used to convert AC (alternating current) power from the wall outlet to DC power that can be used by electronic devices.
• Transportation: Electric vehicles, such as cars, buses, and trains, rely on DC power to run their electric motors.
• Renewable energy: Solar panels and wind turbines generate DC power, which is converted to AC power using inverters before it can be used to power homes or businesses.
• Industrial machinery: Many industrial machines, such as electric motors and robotics, require DC power to operate.
• Telecommunications: Telecommunications equipment, such as cell towers and base stations, often run on DC power.

Overall, DC power is used in a wide range of applications where a steady, reliable source of power is required.

Read More: DC Power Supply

#DC Power

Single phase 220V (B type)

3kW model

Terminal rated voltage and current: 400V, 41A

Locking screw: M4

Locking terminal restrictions: inner diameter greater than 4mm, outer diameter less than 9mm

Part No.: 39BT-00301301 (BLOCK TERMINAL 0168-2303, 300V, 30A ,3P ,RoHS)

4.5kW, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No.: 39BT-00301401 (BLOCK TERMINAL 0168-4103,600V,115A ,3P ,RoHS)

Three-phase 220V (C type)

4.5W, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No: 39BT-00401501 (BLOCK TERMINAL 0168-4104, 600V, 115A ,4P ,RoHS)

Three-phase 400V (D type)

4.5W, 6kW models

Terminal rated voltage and current: 1000V, 76A

Locking screw: M5

Locking terminal restrictions: inner diameter greater than 5mm, outer diameter less than 13mm

Part No.: 39BT-00500701 (BLOCK TERMINAL 0168-4105, 600V, 115A ,5P ,RoHS)

For other details, please refer to the link below:

https://paper.dropbox.com/doc/PSU-3KW6KW-AC-input-terminal-specification-rfm3pTQd7P6jo3BDIYBi0

Fan is a component that ensures heat dissipation and ensures the normal operation of the power supply.

The PSU series power supply will stop output when there is a fan fail message.

When the fan is in the critical state of failure, the phenomenon of good and bad sometimes causes the failure prompt of Fan Fail indicator to flash.

When your power supply keeps showing Fan Fail prompt, please contact your nearest GW Instek Service Center services@goodwill.com.tw 

Routine maintenance precautions:

1. Avoid dust accumulation in the fan
2. There is a certain cooling distance between the fan and the desktop or wall